Is using bondo to fill up holes on a gas tank a good idea? im repainting my gas tank metallic black soon, and im wondering if the vibrations and bumps would make the bondo fall apart. Maybe using extra hardener would be a good idea? Pretty much planning on restoring the way it looks n make it shine, maybe resell it over the summer. it has 9k miles. Will post pictures when i start the project next week.

I mean you want to pull the dents as much as possible so you only need thin layers of filler. You don't want the bondo to be a half an inch thick on the tank, that's how it starts cracking and falling out looking like doo doo.

mojo is right bondo will work and try to mix it well to ensure less air pockets also make sure you sand the entire area free of the old paint this will ensure good adhision bondo directly onto the metal sand it smooth and constantly feeling for high low spots you want a smooth even surface once done hit it with some etching primber then some sandable primber

o yea right right, well yea i do body work on cars with bondo, and i didnt know what thick is to you, cuz yea like mojo said half an inch thick is ridiculous. but i dont think i will have a choice on this one...i will figure something out and will post pictures during and after. thanks!

ditto, gas will lift the bondo. When you see this big old bubble start to form on your tank that you just painted, wait another day and youll see gas leaking all over the place..and that thumping sound you will be hearing will be your head that your beating the wall with..

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